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Finding the Fourth Proportional to 281,017.05, 387,806.59 and 153,689.91

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Solution

The fourth proportional to 281,017.05, 387,806.59 and 153,689.91 is: 212,093.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,017.05 : 387,806.59 = 153,689.91 : x
  2. Step 2: Convert to fraction form
    281,017.05/387,806.59 = 153,689.91/x
  3. Step 3: Cross multiply
    281,017.05x = 387,806.59 × 153,689.91
  4. Step 4: Simplify right side
    281,017.05x = 59,601,957,787.84
  5. Step 5: Solve for x
    x = 59,601,957,787.84/281,017.05
  6. Step 6: Final answer
    x = 212,093.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.